In the Aug 2015 issue of Handloader there is an in depth article on rifling twist and what velocities are required to stabilize said bullet weights.Quite an eye opener.In regards to the older 1-14" twist anyone wishing to use 100 gr deer bullets will need to drive them at unobtainable speeds to get them to print nose first.The .250-3000 twist/velocity calculations for a 100gr Swift Scirocco ,bullet length 1.120" were 4600 fps by digital and 6000fps with the Berger program! This is for the 1-14" barrels.Even the 90gr Sierra bullet length .896" required 2,950fps and 6,000 respectively! I was able to get pulled old 100gr Dominion RN into 1" groups from an old Savage 99 I once owned but velocity was 2500 + Whether these were tipping past 100 yards ,I cannot say,but I did shoot several deer with them.Too bad Nosler wouldn't make an 80gr Partiton in .257 like the vast selection available for the .243 crowd.None of this affects me now as I use a 1-10" Rem 700 Classic in .250 Savage.The .257 deer bullets available today with the shortest ogive are the Speer 87 gr + 100 gr .Perhaps some of the light weight Barnes X bullets would work,I haven't tried them.............thoughts? Harold